Marc A. Jacobs
J. S. Jones
Rangeland Technology Equipment Council (U.S.)
A. J. Leavitt
Lawrence M. Hamilton
Joy David
Frank Dumont
Clara Janetta Fort Denton
J. C Stewart
Rosamond E. M. Harding
International Congress of Soil Science (7th 1960 Madison, Wis.)
John Kaufmann
Gayle S. Rinehart
De Peyster, J. Watts